frontends = search(:node, "recipes:web\\:\\:frontend").reject { |n| Time.now - Time.at(n[:ohai_time]) > expiry_time }.map { |n| n[:hostname] }.sort
backends = search(:node, "recipes:web\\:\\:backend").reject { |n| Time.now - Time.at(n[:ohai_time]) > expiry_time }.map { |n| n[:hostname] }.sort
tilecaches = search(:node, "roles:tilecache").reject { |n| Time.now - Time.at(n[:ohai_time]) > expiry_time }.sort_by { |n| n[:hostname] }.map do |n|
frontends = search(:node, "recipes:web\\:\\:frontend").reject { |n| Time.now - Time.at(n[:ohai_time]) > expiry_time }.map { |n| n[:hostname] }.sort
backends = search(:node, "recipes:web\\:\\:backend").reject { |n| Time.now - Time.at(n[:ohai_time]) > expiry_time }.map { |n| n[:hostname] }.sort
tilecaches = search(:node, "roles:tilecache").reject { |n| Time.now - Time.at(n[:ohai_time]) > expiry_time }.sort_by { |n| n[:hostname] }.map do |n|